The remains of the Castle can be visited
Eberburg Castle

The Eberburg castle ruin, also known as Ebermannsdorf Castle, is the remnant of a hilltop castle above the municipality of Ebermannsdorf in the Amberg-Sulzbach district of Bavaria. It was once the ancestral seat of the noble family of the Ebermannsdorfers and today houses the oldest preserved polygonal keep in Bavaria.
History+
The first mention of the Ebermannsdorfer family was in 1079. Documents from the Ensdorf Monastery from 1123 and 1129 name Razo and Wirnt von Ebermannsdorf and first mention a chapel called “St. John the Baptist” within the complex.
Source: Wikipedia · Licence: CC BY-SA 4.0 · Image: http://commons.wikimedia.org/wiki/File:Burgruine_Ebermannsdorf01.jpg
This description draws on the facts documented in the linked Wikipedia article; Wikipedia content is licensed under CC BY-SA 4.0. Wording and editing: Mobile History.
Location: 49.3904, 11.9433